[form] fix #719285, due to multiple calls to restore_previous_post, by proper refactorings
* move __init__ code from FieldsForm to Form. Must behaviour here should actually be in the Form base class
* avoid buggy duplicated call to restore_previous_post
* move some code that was in the form renderer to the form'__init__ method (__redirectpath & __form_id hidden input handling))
* 'formvid' should now be specified on form selection, not on form rendering
"""some base form classes for CubicWeb web client
:organization: Logilab
:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
from warnings import warn
from logilab.common.decorators import iclassmethod
from logilab.common.compat import any
from logilab.common.deprecation import deprecated
from cubicweb import typed_eid
from cubicweb.selectors import non_final_entity, match_kwargs, one_line_rset
from cubicweb.web import INTERNAL_FIELD_VALUE, eid_param
from cubicweb.web import uicfg, form, formwidgets as fwdgs
from cubicweb.web.controller import NAV_FORM_PARAMETERS
from cubicweb.web.formfields import StringField, relvoc_unrelated, guess_field
class FieldsForm(form.Form):
"""base class for fields based forms.
The following attributes may be either set on subclasses or given on
form selection to customize the generated form:
* `needs_js`: sequence of javascript files that should be added to handle
this form (through `req.add_js`)
* `needs_css`: sequence of css files that should be added to handle this
form (through `req.add_css`)
* `domid`: value for the "id" attribute of the <form> tag
* `action`: value for the "action" attribute of the <form> tag
* `onsubmit`: value for the "onsubmit" attribute of the <form> tag
* `cssclass`: value for the "class" attribute of the <form> tag
* `cssstyle`: value for the "style" attribute of the <form> tag
* `cwtarget`: value for the "cubicweb:target" attribute of the <form> tag
* `redirect_path`: relative to redirect to after submitting the form
* `copy_nav_params`: flag telling if navigation paramenters should be copied
back in hidden input
* `form_buttons`: form buttons sequence (button widgets instances)
* `form_renderer_id`: id of the form renderer to use to render the form
* `fieldsets_in_order`: fieldset name sequence, to control order
"""
__regid__ = 'base'
# attributes overrideable by subclasses or through __init__
needs_js = ('cubicweb.ajax.js', 'cubicweb.edition.js',)
needs_css = ('cubicweb.form.css',)
action = None
onsubmit = "return freezeFormButtons('%(domid)s');"
cssclass = None
cssstyle = None
cwtarget = None
redirect_path = None
form_buttons = None
form_renderer_id = 'default'
fieldsets_in_order = None
@property
def needs_multipart(self):
"""true if the form needs enctype=multipart/form-data"""
return any(field.needs_multipart for field in self.fields)
def add_hidden(self, name, value=None, **kwargs):
"""add an hidden field to the form"""
kwargs.setdefault('ignore_req_params', True)
kwargs.setdefault('widget', fwdgs.HiddenInput)
field = StringField(name=name, value=value, **kwargs)
if 'id' in kwargs:
# by default, hidden input don't set id attribute. If one is
# explicitly specified, ensure it will be set
field.widget.setdomid = True
self.append_field(field)
return field
def add_media(self):
"""adds media (CSS & JS) required by this widget"""
if self.needs_js:
self._cw.add_js(self.needs_js)
if self.needs_css:
self._cw.add_css(self.needs_css)
def render(self, formvalues=None, rendervalues=None, renderer=None, **kwargs):
"""render this form, using the renderer given in args or the default
FormRenderer()
"""
if rendervalues is not None:
warn('[3.6] rendervalues argument is deprecated, all named arguments will be given instead',
DeprecationWarning, stacklevel=2)
kwargs = rendervalues
self.build_context(formvalues)
if renderer is None:
renderer = self.default_renderer()
return renderer.render(self, kwargs)
def default_renderer(self):
return self._cw.vreg['formrenderers'].select(
self.form_renderer_id, self._cw,
rset=self.cw_rset, row=self.cw_row, col=self.cw_col)
formvalues = None
def build_context(self, formvalues=None):
"""build form context values (the .context attribute which is a
dictionary with field instance as key associated to a dictionary
containing field 'name' (qualified), 'id', 'value' (for display, always
a string).
"""
if self.formvalues is not None:
return # already built
self.formvalues = formvalues or {}
# use a copy in case fields are modified while context is build (eg
# __linkto handling for instance)
for field in self.fields[:]:
for field in field.actual_fields(self):
field.form_init(self)
@deprecated('[3.6] use .add_hidden(name, value, **kwargs)')
def form_add_hidden(self, name, value=None, **kwargs):
return self.add_hidden(name, value, **kwargs)
@deprecated('[3.6] use .render(formvalues, **rendervalues)')
def form_render(self, **values):
"""render this form, using the renderer given in args or the default
FormRenderer()
"""
self.build_context(values)
renderer = values.pop('renderer', None)
if renderer is None:
renderer = self.default_renderer()
return renderer.render(self, values)
_AFF = uicfg.autoform_field
_AFF_KWARGS = uicfg.autoform_field_kwargs
class EntityFieldsForm(FieldsForm):
__regid__ = 'base'
__select__ = (match_kwargs('entity')
| (one_line_rset() & non_final_entity()))
internal_fields = FieldsForm.internal_fields + ('__type', 'eid', '__maineid')
domid = 'entityForm'
@iclassmethod
def field_by_name(cls_or_self, name, role=None, eschema=None):
"""return field with the given name and role. If field is not explicitly
defined for the form but `eclass` is specified, guess_field will be
called.
"""
try:
return super(EntityFieldsForm, cls_or_self).field_by_name(name, role)
except form.FieldNotFound:
if eschema is None or role is None or not name in eschema.schema:
raise
rschema = eschema.schema.rschema(name)
# XXX use a sample target type. Document this.
tschemas = rschema.targets(eschema, role)
fieldcls = _AFF.etype_get(eschema, rschema, role, tschemas[0])
kwargs = _AFF_KWARGS.etype_get(eschema, rschema, role, tschemas[0])
if kwargs is None:
kwargs = {}
if fieldcls:
if not isinstance(fieldcls, type):
return fieldcls # already and instance
return fieldcls(name=name, role=role, eidparam=True, **kwargs)
field = guess_field(eschema, rschema, role, eidparam=True, **kwargs)
if field is None:
raise
return field
def __init__(self, _cw, rset=None, row=None, col=None, **kwargs):
try:
self.edited_entity = kwargs.pop('entity')
except KeyError:
self.edited_entity = rset.complete_entity(row or 0, col or 0)
msg = kwargs.pop('submitmsg', None)
super(EntityFieldsForm, self).__init__(_cw, rset, row, col, **kwargs)
self.add_hidden('__type', self.edited_entity.__regid__, eidparam=True)
self.add_hidden('eid', self.edited_entity.eid)
if kwargs.get('mainform', True): # mainform default to true in parent
self.add_hidden(u'__maineid', self.edited_entity.eid)
# If we need to directly attach the new object to another one
if self._cw.list_form_param('__linkto'):
for linkto in self._cw.list_form_param('__linkto'):
self.add_hidden('__linkto', linkto)
if msg:
msg = '%s %s' % (msg, self._cw._('and linked'))
else:
msg = self._cw._('entity linked')
if msg:
self.add_hidden('__message', msg)
def session_key(self):
"""return the key that may be used to store / retreive data about a
previous post which failed because of a validation error
"""
if self.force_session_key is not None:
return self.force_session_key
# XXX if this is a json request, suppose we should redirect to the
# entity primary view
if self._cw.json_request and self.edited_entity.has_eid():
return '%s#%s' % (self.edited_entity.absolute_url(), self.domid)
# XXX we should not consider some url parameters that may lead to
# different url after a validation error
return '%s#%s' % (self._cw.url(), self.domid)
def build_context(self, formvalues=None):
if self.formvalues is not None:
return # already built
super(EntityFieldsForm, self).build_context(formvalues)
edited = set()
for field in self.fields:
if field.eidparam:
edited.add(field.role_name())
self.add_hidden('_cw_edited_fields', u','.join(edited), eidparam=True)
def default_renderer(self):
return self._cw.vreg['formrenderers'].select(
self.form_renderer_id, self._cw, rset=self.cw_rset, row=self.cw_row,
col=self.cw_col, entity=self.edited_entity)
def should_display_add_new_relation_link(self, rschema, existant, card):
return False
# controller side method (eg POST reception handling)
def actual_eid(self, eid):
# should be either an int (existant entity) or a variable (to be
# created entity)
assert eid or eid == 0, repr(eid) # 0 is a valid eid
try:
return typed_eid(eid)
except ValueError:
try:
return self._cw.data['eidmap'][eid]
except KeyError:
self._cw.data['eidmap'][eid] = None
return None
def editable_relations(self):
return ()
@deprecated('[3.6] use cw.web.formfields.relvoc_unrelated function')
def subject_relation_vocabulary(self, rtype, limit=None):
"""defaut vocabulary method for the given relation, looking for
relation's object entities (i.e. self is the subject)
"""
return relvoc_unrelated(self.edited_entity, rtype, 'subject', limit=None)
@deprecated('[3.6] use cw.web.formfields.relvoc_unrelated function')
def object_relation_vocabulary(self, rtype, limit=None):
return relvoc_unrelated(self.edited_entity, rtype, 'object', limit=None)
class CompositeFormMixIn(object):
"""form composed of sub-forms"""
__regid__ = 'composite'
form_renderer_id = __regid__
def __init__(self, *args, **kwargs):
super(CompositeFormMixIn, self).__init__(*args, **kwargs)
self.forms = []
def add_subform(self, subform):
"""mark given form as a subform and append it"""
subform.parent_form = self
self.forms.append(subform)
def build_context(self, formvalues=None):
super(CompositeFormMixIn, self).build_context(formvalues)
for form in self.forms:
form.build_context(formvalues)
class CompositeForm(CompositeFormMixIn, FieldsForm):
pass
class CompositeEntityForm(CompositeFormMixIn, EntityFieldsForm):
pass # XXX why is this class necessary?